The IB-542 HookUpz Digiscoping Adapter iPhone 4, 4s, 5, 5s from Carson Optical is a digiscoping accessory that allows you to capture the view transmitted by your binocular using the iPhone 4, 4s, 5, 5s. This adapter comes with an iPhone case and eyepiece adapter that connects to one of the binocular eyepieces or spotting scope. A removable rubber ring inside the adapter enables the HookUpz to fit a wide range of eyepiece diameters; the IB-542 is designed to fit binoculars with 32mm to 50mm objectives. Whether birding in your local park or visiting landmarks during your vacation, the HookUpz adapter gives you the ability to capture the view from your optic and share photos or video using your iPhone.